Magnetron casing



P 2, 1969 E. G. DORGELO 3,465,201

MAGNETRON CASING Filed March 27. 1967 INVENTOR. EDUARD 5. DORGELO AGENT United States Patent 3,465,201 MAGNETRON CASING Eduard G. Dorgelo, Huntington, N.Y., assignor, by mesne assignments, to U.S. Philips Corporation, New York, N.Y., a corporation of Delaware Filed Mar. 27, 1967, Ser. No. 626,300 int. Cl. H013 25/50 US. Cl. 315-3951 4 Claims ABSTRACT OF THE DISCLQSURE The invention relates to a magnetron and more particularly to a magnetron casing in intimate contact with an anode block for efficiently conducting heat away from the anode block.

The invention will be best understood from the following description of an exemplification thereof, reference being had to the accompanying drawing in which the sole figure is a sectional view of a magnetron according to the invention.

The magnetron illustrated comprises an envelope constituted by two cups 1, 2 of thin non-magnetic material, preferably soft copper or other ductile, good heat-conducting material separated by a stainless steel spacer or sleeve 3. Within the envelope are magnetic pole-pieces 4, of iron and a copper anode block 6, which is supported by sleeve 3.

Pole pieces 4 and 5 are in intimate contact with and held securely by cups 1, 2 as a result of a pressure differential between the evacuated interior of the envelope and the sleeve 3 which fits over the ends of the cups.

A helically wound cathode 7 provided with molybdenum end hats 8, 9 is supported in the central space of I 3,465,2M Patented Sept. 2, 1969 ice the anode block 6 by a pair of lead-in conductors 10, 11. A lead-in conductor 12 is provided for the anode block.

The magnetron according to the invention is easy to assemble, dissipates heat effectively because of the intimate contact 'between the anode block and the envelope, and has a more effective magnetic field because the polepieces are supported within the envelope thereby reducing the gap-length between them.

While the invention has been disclosed with reference to a specific embodiment thereof, other modifications will be apparent to those skilled in the art without departing from the spirit and scope of the invention which is defined in the appended claims.

What is claimed is:

1. A magnetron comprising a hollow evacuated envelope including a pair of cup-shaped members having a relatively thin wall deformable by atmospheric pressure, an anode block between the peripheral edges of said cupshaped members, a pole piece within and supported by each of said cup-shaped members spaced from said anode block, and a cylindrical spacer member of a thin, nonmagnetic, relatively hard material supported by said anode block and separating said cup-shaped members.

2. A magnetron as claimed in claim 1, in which the cup-shaped members consist of a good heat-conducting material.

3. A magnetron as claimed in claim 2, in which the cup-shaped members consist of soft copper.

4. A magnetron as claimed in claim 3, in which the spacer members consists of stainless steel.

References Cited UNITED STATES PATENTS 9/1946 Spencer 313-158 X 8/1958 Crapuchettes 313-44 X US Cl. X.R. 

